import os
import json
import logging
import gradio as gr
from utils.response_manager import ResponseManager 

class ChatbotInterface:
    def __init__(self, config_path: str = 'config/gradio_config.json'):
        """
        Initialize the ChatbotInterface with configuration.
        :param config_path: Path to the configuration JSON file.
        """
        self.config = self.load_config(config_path)
        self.title = self.config["chatbot_title"]
        self.description = self.config["chatbot_description"]
        self.input_label = self.config["chatbot_input_label"]
        self.input_placeholder = self.config["chatbot_input_placeholder"]
        self.output_label = self.config["chatbot_output_label"]
        self.reset_button = self.config["chatbot_reset_button"]
        self.submit_button = self.config["chatbot_submit_button"]
        self.response_manager = ResponseManager()
        self.conversation = self.response_manager.conversation  # Shortcut to the conversation method
        logging.info("ChatbotInterface initialized with configuration.")

    @staticmethod
    def load_config(config_path: str) -> dict:
        """
        Load the configuration for Gradio GUI interface from the JSON file.
        :param config_path: Path to the configuration JSON file.
        :return: Configuration dictionary.
        """
        logging.info(f"Loading configuration from {config_path}...")
        if not os.path.exists(config_path):
            logging.error(f"Configuration file not found: {config_path}")
            raise FileNotFoundError(f"Configuration file not found: {config_path}")

        with open(config_path, 'r') as config_file:
            config = json.load(config_file)

        required_keys = [
            "chatbot_title", "chatbot_description", "chatbot_input_label",
            "chatbot_input_placeholder", "chatbot_output_label",
            "chatbot_reset_button", "chatbot_submit_button"
        ]
        for key in required_keys:
            if key not in config:
                logging.error(f"Missing required configuration key: {key}")
                raise ValueError(f"Missing required configuration key: {key}")

        logging.info("Configuration loaded successfully.")
        return config

    def reset_output(self) -> list:
        """
        Reset the chatbot output.
        :return: An empty list to reset the output.
        """
        return []

    def create_interface(self) -> gr.Blocks:
        """
        Create the Gradio Blocks interface.
        :return: A Gradio Blocks interface object.
        """
        logging.info("Creating Gradio interface...")

        # Define the Gradio Blocks interface
        with gr.Blocks() as demo:
            gr.Markdown(f"## {self.title}\n{self.description}")

            # Chatbot history component
            chatbot_output = gr.Chatbot(label=self.output_label, type="messages")

            # User input
            user_input = gr.Textbox(
                lines=2,
                label=self.input_label,
                placeholder=self.input_placeholder
            )

            # Buttons
            with gr.Row():
                reset = gr.Button(self.reset_button, variant="secondary")
                submit = gr.Button(self.submit_button, variant="primary")

            # Button actions
            submit.click(fn=self.conversation, inputs=[user_input, chatbot_output], outputs=chatbot_output)
            user_input.submit(fn=self.conversation, inputs=[user_input, chatbot_output], outputs=chatbot_output)
            reset.click(fn=self.reset_output, inputs=None, outputs=chatbot_output)

        logging.info("Gradio interface created successfully.")
        return demo